Diazo-compounds, 110, 286 Diethyl sulphate, 23 Digestive tract, diseases of, 76, 129, 130, 133, 179, 182, 186 Dimethyl aniline, 109 Dinitrobenzene, 35, 108, 112, 115, 116, 212 Dinitrochlorobenzene, 115, 209, 212 Dinitrophenol, 115, 212, 213 Dinitrotoluol, 108, 212 Distillation, 253, 255 of alcohol, 333 petroleum. See Petroleum distillation tar. See Tar distillation Dowson gas, 82, 83, 87, 276 Dräger’s oxygen apparatus, 165-167 Dry cleaning. See Benzine Dust removal, =243-256= (iii). See also Ventilation Dye stuffs, =107-119= (i), =214= (ii), =285-288= (iii), 337 Dyeing and colouring, 44, 45, 55, 57, 92, 134, 144, 156, 265, 310-316, 337 Dynamite, 43, 47 Earthenware. See Pottery Eczema, 64, 186 Electric furnace, 85 Electroplating, 196, 327, 329 Enamel, 135, 322 Encephalopathy, 181 Etching on glass and metal, 37, 40, 45, 57 Ether, 68, 69 Ethyl alcohol, 34, 210 chloride, 34 Explosives, =45= (i), 49, 115, =260= (iii) Extraction, 54, 61, =68= (i), 68-69, 71, 100, 103, 117, 186, =253= (iii), 267, 272-274 Eye affections, 21, 23, 38, 55, 57, 65, 68, 70, 75, 93, 115, 116, 119, 171, 174, 175, 210 Fans, =244-247= (iii). See also Ventilation Fat extraction, 34, 61, 68, 70, 71, 272-274 Fermentation, 154, 333 Ferrosilicon, 53, 85, 146, =149-151= (i), 199, =291= (iii) File cutting, =140= (i), 294, =322-323= (iii) Fluorine. See Hydrofluoric acid Fluorine compounds, 37, 54, 153, 171, 265 Flux, 135, 149 Frit, 135, 136, 137, 138, 320 Fuchsin, 111, 113, 119, 144, 287 Fulminate of mercury, =46= (i), 143, 261 Galvanising, 94, 95, 152, 326, 329 Gas engines, 82, 88, 89, 100, =276-278= (iii) lighting, =71-89= (i), 92, 93, 175, =275= (iii) lime, 65, 94, 153, 275 purifying material, 5, 65, 68, 74, 75, =93= (i), =275= (iii), 276 Gay-Lussac tower, 5, 6, 10, 11, 256, 257, 287 Generator gas. See Producer gas Glass etching, 37, 38, 153, 330 industry, 19, 37, 39, 55, 58, 82, 88, 138, 143, =153= (i), 322 pearl silvering, 152 Glazing, =135-138= (i), =319-322= (iii) Glover acid, 6, 8 tower, 5, 6, 257, 287 Gold, 44, 94, 125, 152 Gun-cotton, 47-49 Guttapercha, 69 Hæmolysis, 158 Halogens, =31= (i), =173-174= (ii) Hargreaves process, 19, 28 Hatters’ furriers’ processes, 45, 141, 142, 154, 327 Hausmannite, 58 Health register, 227, 264, 274, 298, 304, 307 Hides and skins, preparation of, 142, 143, 144, 184, 327 Hops, sulphuring of, 154, 333 House painting, 121, 122, =132-133= (i), 294, =314-316= (iii) Hydrocarbons, 96, 106, 158, 286, 287, 330, 331 (aliphatic), 96, 202 (aromatic), 96, 108, 109, 202, 204, 330 Hydrochloric acid, =14= (i), 15, 20, 21, 23, 30-35, 39, 44, 50, 54, 59, 113, 145, 131, =170= (ii), =257-258= (iii), 286, 326 Hydrofluoric acid, =29= (i), 37, 38, 50, 54, 96, 153, =171= (ii), =265= (iii)